18564426992 has 20 divisors (see below), whose sum is σ = 36000471120. Its totient is φ = 9273982848.

The previous prime is 18564426983. The next prime is 18564426997. The reversal of 18564426992 is 29962446581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18564426997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495788 + ... + 531915.

It is an arithmetic number, because the mean of its divisors is an integer number (1800023556).

Almost surely, 2^18564426992 is an apocalyptic number.

It is an amenable number.

18564426992 is a deficient number, since it is larger than the sum of its proper divisors (17436044128).

18564426992 is a wasteful number, since it uses less digits than its factorization.

18564426992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028840 (or 1028834 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 56.

The spelling of 18564426992 in words is "eighteen billion, five hundred sixty-four million, four hundred twenty-six thousand, nine hundred ninety-two".